Question

SOMEONE PLEASE HELP ME! and also please explain how you solved this. thanks !! :)

Answer 1

|DC| = 9

Explanation:

Set up and solve an equation of ratios. This is possible because the upper and lower triangles are similar. AB = 10 and DE = 12, so we can write

20 15

---- = -------

12 |DC|

Then 20 |DC| = 12(15) = 180. Solving for |DC| : |DC| = 180/20 = 9